Definition of mandylion:
(n) :
(chiefly Eastern Orthodoxy) often Mandylion: the Image of Edessa, a holy relic consisting of a piece of cloth upon which an image of the face of Jesus Christ had been miraculously imprinted without human intervention (that is, an acheiropoieton); an artistic depiction of this relic.
(n) :
Alternative letter-case form of mandylion. [(chiefly Eastern Orthodoxy) often Mandylion: the Image of Edessa, a holy relic consisting of a piece of cloth upon which an image of the face of Jesus Christ had been miraculously imprinted without human intervention (that is, an acheiropoieton); an artistic depiction of this relic.]